Gas-burner.



Patented Feb. i8, |902.V

7?/0 )7;071 A5" j e' Mm. bww MW y Oormetys.

J. CRANE, 1n.

GAS BURNER.

(Application med Junuy 26. 1901.)

(No Model.)

JSUUA CRANE, i

SPECLFXCATION onning part of Letters Paient 'o. GQ?.

Application fileci June SOL En it; known ti "9m I, .iiiisnUA fimziia, Jr.: n z citzenof the Unite( it-fiin insiding :ai ii-MSL* wood, in die cnnntynl mmlk, Sint/i ui achnsntts, lime invenifed n @in new nini uefui Iinprovexneniizi 'i ,n'nfnzstf wlic'n the followingis a specification, i'nfninnnn ii@- ng had therein to ihn, ancomgmnying drawings.

The burner herein i beni and shown in an. impmvemenh @n than patente/l 'L0 W. .i Dudley by United Sintes Piment N04, :3438A issuedSepmnber 22, 189C,

The invention will iii'sl, lin ii'maciiim 2.2 ill: reference to inn zicnnnipnnying flrziwinggn, which illustrate 'Lize iiefinanlinilimnni inernni" yet deviseffl by nu), and, ziiinrwzn-i in@ esem tial characterisi-ics nl the inveninn Ywill :in particularly pointed mi and distinctly ai@ fined in ihn @minis n, the eins@ nf this simcifcation,

In thei'llnwings, .ifigiu'ni ifi @l ver! imil m55 Section of the bni'nm in iin closed lglfnniilinn. Fib. f2 n simil-fn' neciion :gif in@ midi ie pmllion 0f ille bui-nini, flauw' ,5,2 ihn innnfi in iis open nondiiion. Fig. ii in View in nm'niioi., :lmwing tlm ip of Lim immun* ansi zifiincnnL parts. Fig, -i in a pim View ni tim suine.

In the (lriiwinggf's, l designarn," iii@ pilizir oi' bnrnentube, in tlm nppnz' @mi 05 ,iiigii in.- sermd the usual iii) iin the :annnlzn' lifm'f ing-chamber snr minding saisi iin, anni fi H16 pipe lading Lliei'nfmni inwnvfzmily the valve, hercinzii'lnr more pamifxnlmly du scribed. 'ihn iii'si. faalnw of Lin; present impi'ovexnent relates to Lim cuan-winmx; in'fiwemi said annular lxeaiingcmminei imi pi e. in the patent above referred to the paris :im di scribed an separately formed und inviami n gef/hei'. i have marin repented expfn'imfnin to produce such u consume-Lion axpecliirmniy, cheaply, and with ihn certainty of Olniininig a, tightjoint. The nai outcome o :nuria cxperiznents has been the production and anion` Lion 0f "tinaaixangnieni iiins'lrfitei liel'vin. In Lliis :ii-rangement the annular heating chamber is formed of an integral extension i of the pipe i, bent to n circular form of tne required dinnnwi' and having its @xllremily 5 pinched up, broughtinm Contact; with the initial bend (3 of in@ pipe, and. bra/cal therein,

such biazing serving not only to seem-o said i: fen Llin l, im lining lient in :unimi when in une, linzxnfbicnliy. fin gipoiiinguilisk in@ Enid piilm' fitting inw/ion ni boss, which dini; when lille latter parts 'aiming soldered #ig-pipa 4- Pansen inw i', :is nl '7, where it is inns down contrally The sind disk in@ pipe from lateral f iti-ins S am formed in i, nii-ai Linie is not in a ring 10 oldnrli. '.lhe'z'ngf 'Ling firing@ 12, and .ni-'waan suc'li flange Tim iin f em-ral holo to rennivn ill@ i sinwn, lin nml of the 1,0 prevent; iis wiilv :is infini; nilflinrri Luinsn a iight, joint linnin in@ dinninngin The ring i0 E5 Giel' il.,

W inni. iii@ inz' linnn meniionail are iii-sli nnb'nniiiinfi, ilm di L lnngxnfiis so applied and nf the pip@ 4 that the Qi -i ,i linx' .gn of the ring l() willi the under suffixe@ i' iii@ iliaplirzxgnicliaixi bei' linea mien ir'inpiifeii nml .filled lient npplimi in anni .m n ignition nf tfno containon nun, ninth, in xviii Minne "be umlersbood,

' ni' in@ nip@ ai and in IOC throws the diaphragm-chamber the disk G1, as shown in Fig. 2, by reversing the curvature of or, in other words, convexing,` the middle portion of the diaphragm. While the disk and diaphragm-chamber are thus separated, an annular leather washer 1G is inserted between them by being temporarily elongated and slipped over the diaphragm-chamber and then restored to form and seated against the disk. The outer diameter of said washer is the same as the diametcr ofthe disk (il. Now when the burner is allowed to cool the diaphragm-chamber or, more precisely speaking, the upper surface of the flange l2 ofthe ring 10, will be forced by the sclfrecovering action ofthe diaphragm (hereinafter explained) up into close gastight contact with the washer. In the above position, as will of course be understood, the diaphragm-chamber acts as a valve to close completely the burner to the passage of gas into the pillar, while in the position shown in Fig. 2 the valve fs opened and free passage of gas is permit-ted.

17 is a cup adapted tol support the parts hereinabove described and to inclose the diaphragm-chamber. 1S is a hollow neck pro- `iectingcentrallydownward from saidcup and intcriorly screw-threaded, as at lil, for attachment to the bracket or other support te which the burner iste bcallixc'd. The inner edge of the cu p is rabbeted to receive the disk' (il, and when the latter has been put in place the rim 2O of the cup is spun over upon the margin ofthe disk, thus clampingthe two tegether. As will be observcd,'the outer margin of the packing lo is interpost'ed between the cup and disk. 'lhus thc said packing is made toy serve the double function of closing the joint between the cup and disk and otserving asa seat for the valve constituted by the diaphragm-chamber. 'lhe most' important aim which I have had, however, is to render practicable the employment of a spring-metal diaphragm. lt is not intended by this term to include metal diaphragms havingr a slight and incidental resistance to lexurc, but a tcmpered-metal disk capable of fully recovering its original shape after being lexed without the uncertain aid ol' springs or aiiepressure. Air-pressure is ol' course present and exerts some tendency to assist the restoration of shape ofthediaphragm upon decrcaseof lludf pressure within the diaphragni-chamber; but in my device the dhtphragm, as just stated, has the properly of recovering its original shape wholly independently of the said airpressure, and hence can be positively dopendcd upon to perform its intended func tion. 'lhe capability just referred to may be brielly expressed as that of self-recovery, and a diaphragm havingr that. capability may be termed a st-lf.-recovering7 diaphragm. lhe superiority ol' such a diaphragm will upon consideration be apparent. It reduces the mechanism of the burnertoa minimum. In

away from my burner there are neither loose norslidinglnor pivoted parts. The employment ofsuch diaphragm also renders the burner sure of operation. Not only is the diaphragm of my burner self-recovering when flexed, but in its position in the assembled device and subject to the conditions of actual use it exerts such force in the action ofself-recover f as to close very firmly the valve which it actuates, and thus to prevent with certainty the undesired and dangerous escape of gas, while its amplitude of motion is quite adequate to secure a clear passage for gas when the tlame thereof is burning.

The rm closing of the valve just mentioned is always essential, but is especially dicult of attainment where the advantage of-a packing interposed between the valve and its seat is sought to be secured, as in the arrangement herein shown and already described, for with such construction it is not sucient that a merely physical contact bctween the valve and the packing should take place. On the contrary, it is necessary for the production and maintenance of a gastight closure that the valve after making contact with the packing shall be drawn against the latter with considerable force. Upon the flexure ot' the diaphragm the packing is relieved of compression and exhibits a certain degree ofexpansion, thereby following up the motion of the diaphragm-chamber to amaterial extent, still keeping the burner substan-v tially closed to the passage `of gas. For this reason it requires adaphragm of considerable amplitude of motion tov separate the valve which it actuates com ing, and thereby to permit a free passage of gas to the burner-tip. This action, however, is readily secured with the diaphragm herein described.

In using the term metal, however, I- do not confine myselt` to the use of what is ordinarily known as a metal if there be other substances capable of a similar action in re-A gard to resiliency burner such as vherein described.

'lo obtain the advantages enumerated above, I preferably employ av concave or dished diaphragm ofspring-brass. It is only, howevcr,aftercontinued experiment and consideration that I have been able to produce in quantity and with an intelligentunderstanding ot' the conditions of practical success spring-diaphragms having the property of self-recovery. I have finally ascertained that in order that such diaphragm lmay be its surface must have acurva1 ture not exceeding a certain predetermined amount-that is to say, that when less than said curvature is imparted the diaphragm takes on the additional quality of selffrecovcry, which it does not possessif eharacterized by a greater curvature. To avail myself et this property, which, sorfaras I am aware, is of my own discovery, I employ tools 'or v machinery to produce the curvature or Fishing Vof the diaphragm which is se proporandadaptation to use ina Aroo pletely from such pack- ICS IXO

terim* area n back into its original position ofy co'iicaif'ity, but that such tendency has to act against the resistance of fullness of the metal in the said interio area to being so jdrawn or crowded back Now I have foundthat if the-fullness is greater than a certain amount by the curvature of the diaphragm exceeding a certain degree such withdrawal will not be eiected, but the displacement of the diaphragm will 4become permanent. It will also be evidentfas before intimated, that v"the forcewith which the diaphragm-chamber (or more precisely the upper surface of the flange i2 thereof) is drawn against the packing 16 when the diaphragm has recovered itself into'fthe position shown in Fig. l is ample to produce a gas-tight closure between said parts, the diaphragm then being in its extreme position of concavity and ali its portions acting to augment such pressure.

l. In a burner, the combination of a burnertube, a support therefor, a thermally-operated valve for controlling the flow through said burner-tube, a pipe leading from the operat- 'ing mechanism of said valve into proximity to the burnerstip, and an annular heatingchamber surrounding said tip and formed by an integral extension ofsaid pipe, having its extremityclosed and brazed to the intermediate portion of the pipe, whereby the said extremity is both hermetically sealed and secured from displacement.

2. In aburner, the combination of a burnertube, a disk on which the same is mounted, a diaphragm-chamber below the disk, and a pipe leadingr upward from the diaphragmchamber fitting a hole inthe disk and extending into proximity to the ytip of the burnertube, whereby the said disk is `caused to support or steady the lower end of the said pipe and diaphragm-chamber.

3. In aburner, the combination of a burnertube, a disk supporting the same, a cup having a raboeted edge receiving the disk and a turned-over rim to secure the disk in place, na packinginterposed between the cupand 4. In aburner, the combinai ion of a bu rner tube, a disk, a cup to which the disk is attached, a Valve within the cup, adapted to move toward and from the disk, and an ann ular packing the outer margin of which is intei-posed between the cup and disk while the inner margin extends between the valve and disk.

5. In a burner, the combination of a burnertube, a disk, a cup to which the disk is attached, a diaphragm-chamber located within the cup, a pipe leading from a point in proximity to the dame of the burner through the disk, and aixed to the diaphragm of the diaphragm-chamber, whereby the latter is ceutrall y supported, and an annular packing the outer margin of which is interposed between the cup and disk while the inner margin extends hetween the disk and diaphragm-chamber. f

G. in a burner, the combination of a burnertube, a valve for controlling the flow of gas therethrough, and actuating means for automatically opening and closing said Valve, including a concave spring-metal diaphragm subjected to thermally-affected fluid-pressure on its convex side, said diaphragm having its marginal portion secured and being self-recovering upon decrease of the aforesaid {luidpressure.

7. In a burner, the combination of a burnertube, a valve for controlling the flow of gas therethrough consisting of a movable chamber, and having one wall thereof formed by a concave spring-metal diaphragm secured at its margin, and a pipe leading from a point in proximity to the burner-flame to the said chamber, the said diaphragm receiving said pipe at its center and being self-recovering upon decrease of pressure within the diaphragm-ehamber.

8. In aburner, the combination of a burnertube, a valve for controlling the flow of gas therethrough consisting of a movable chainher having an inturned ange, and having one wall thereof formed bya concave springmetal diaphragm, and a pipe leading from a point in proximity to the burner-flame to the said chamber, the said spring-,metal dia.- phragm receiving said pipe at its center, having the marginal portion thereof affixed to said incur-ned flange, and being self-recovering upon decrease of pressure within the diaphragm-chamber.

In testimony whereof I afx my signature in presence of two witnesses.

r JOSHUA CRANE, JR. Witne.sl"tai:1

LEPINEJIEALL Rien, ROBERTQWLLACE. 

